用javascript打造一个简单的小人互殴系统（实现javascript游戏基本要素：生命值、伤害、移动、闪避等）
作者：互联网
这个东西，还是和上次那个太阳系模型一样，是我在在职MBA课堂上无聊时随便做的，图片是随便弄的，因为是闹着玩的，所以并没有使用html5或者svg。
简单说，这个东西给人物加了碰撞检测和血条、伤害计算等等一些游戏里面最基本的元素，每个小人会随机选择场上的另一个小人为目标向它发射攻击的球球，球球如果命中敌方，敌方就会受到伤害，血量为零就挂了。每个小人都会在画面里面随机移动，至少不能傻站着挨打吧。
没考虑那些什么复杂的闪避了，毕竟只是我随手之作，之所以发到CSDN上面仅作备忘之用，当然，也许可以给无意间搜到我这篇文章的人一点帮助。
<html>
<style type="text/css">
p{margin:0;padding:0}
</style>
<body style="width:100%;height:100%;margin:0;padding:0;background-color:rgb(220,220,220);overflow:hidden;">
<div style="position:absolute;z-index:400;right:0;bottom:0;">
<div id="sumMen" style="width:100px;"></div>
<div id="sumBasket" style="width:100px;"></div>
</div>
</body>
<script>
var names = [
'Adam','Alex',
'Bob','Bruce',
'Carl','Colin',
'David','Dennis',
'Edward','Edgar',
'Franklin','Fred',
'Gabriel','George',
'Hunk','Henry',
'Ivan','Issac',
'Jack','Jerry',
'Ken','Kevin',
'Leo','Luke',
'Mary','Marks',
'Neil','Nicholas',
'Oliver','Oscar',
'Peter','Philip',
'Quentin','Queen',
'Randy','Rex',
'Sam','Simon',
'Tom','Tyler',
'Uno','Ub',
'Van','Vincent',
'Wesley','William',
'Xio','Xar',
'Yell','Yeti',
'Zero','Zeg'
];
var w = window.innerWidth;
var h = window.innerHeight;
var Basket = [];
var Men = [];
var Man = function(){
var man = this;
man.name = names[Math.floor(Math.random()*names.length)];
man.index = Math.floor(Math.random()*(6-1+1))+1;
man.x = Math.random()*(w-35);
man.y =Math.random()*(h-90);
man.HP = 50;
man.maxHP = man.HP;
man.sx = (Math.random()>0.5?-1:1) * Math.floor(Math.random()*2+0.5);
man.sy = (Math.random()>0.5?-1:1) * Math.floor(Math.random()*2+0.5);
man.cx = man.x + 10;
man.cy = man.y + 30;
man.shell = document.createElement("div");
man.shell.style = 'width:30px;position:absolute;left:'+ man.x + ";top:" + man.y + ";";
man.blood_bgbar = document.createElement("div");
man.blood_bgbar.style = 'position:absolute;top:0;left:0;background-color:gray;width:30px;height:10px;';
man.shell.appendChild(man.blood_bgbar);
man.blood_bar = document.createElement("div");
man.blood_bar.style = 'position:absolute;top:0;left:0;background-color:springgreen;width:30px;height:10px;';
man.shell.appendChild(man.blood_bar);
man.image = document.createElement("img");
man.image.style = "position:absolute;top:15px;";
man.image_anchor = this.index + ".png";
man.image.src = this.image_anchor;
man.shell.appendChild(man.image);
man.attack = Math.random()*2;
man.froze = document.createElement("div");
man.froze.style = 'position:absolute;top:80;left:0;background-color:skyblue;width:30px;height:3px;';
man.shell.appendChild(man.froze);
man.label = document.createElement("div");
man.label.style = 'position:absolute;top:83;left:0;text-align:center;font-size:10px;width:30px;';
man.label.innerText = man.name;
man.shell.appendChild(man.label);
man.loadingtime = 0;
man.canshoot = true;
man.frozetime = Math.floor(Math.random()*1500)+1000;
man.shootspeed = Math.floor(Math.random()*4+2);
document.body.appendChild(this.shell);
man.shoot = function(t){
man.loadingtime += t;
man.froze.style.width = (man.loadingtime/man.frozetime)*30 + "px";
if(man.loadingtime>=man.frozetime){
man.canshoot = true;
man.loadingtime -= man.frozetime;
}
if(Men.length==1) return;
if(!man.canshoot) return;
var enemy;
while(true){
enemy = Men[Math.floor(Math.random()*Men.length)];
if(enemy!=man){
break;
}
}
var ball = document.createElement("div");
ball.x = man.cx;
ball.y = man.cy;
ball.speed = man.shootspeed;
ball.style = "width:10px;height:10px;background-color:RoyalBlue;border-radius:10px;position:absolute;left:" + ball.x + ";top:" + ball.y + ";";
ball.living = true;
ball.angle = Math.atan2((enemy.cy-ball.y),(enemy.cx-ball.x));
ball.sx = ball.speed * Math.cos(ball.angle);
ball.sy = ball.speed * Math.sin(ball.angle);
ball.master = man;
document.body.appendChild(ball);
Basket.push(ball);
man.canshoot = false;
}
man.walk = function(t){
if(Math.random()<0.1) man.sx = (Math.random()>0.5?-1:1) * Math.floor(Math.random()*2+0.5);
if(Math.random()<0.1) man.sy = (Math.random()>0.5?-1:1) * Math.floor(Math.random()*2+0.5);
//man.sy = (Math.random()>0.5?-1:1) * Math.floor(Math.random()*2+0.5);
man.x += man.sx * t /10;
man.y += man.sy * t /10;
man.shell.style.left = man.x;
man.shell.style.top = man.y;
man.cx = man.x + 10;
man.cy = man.y + 30;
if(man.x < 0) { man.x = 0; man.sx = -man.sx; }
if(man.x > w-35 ) { man.x = w-35; man.sx = -man.sx; }
if(man.y < 0) { man.y = 0; man.sy = -man.sy;}
if(man.y > h-85) { man.y = h-90; man.sy = -man.sy; }
}
man.hurt = function(){
man.image.src = "hurt.png";
man.HP -= 1+man.attack;
man.blood_bar.style.width = man.HP/man.maxHP*30 + "px";
setTimeout(function(){
man.image.src = man.image_anchor;
},300);
}
}
function init(){
for(var i=0;i<1000;i++){
Men.push(new Man());
}
}
function id(x){return document.getElementById(x);}
var sumBasket = id("sumBasket");
var sumMen = id("sumMen");
var starttime = new Date();
var endtime = new Date();
var lerp = endtime - starttime;
function raf(){
endtime = new Date();
lerp = endtime - starttime;
for(var i=0;i<Men.length;i++){
Men[i].walk(lerp);
Men[i].shoot(lerp);
}
//check collision
for(var i=0;i<Basket.length;i++){
for(var j=0;j<Men.length;j++){
// && Basket[i].x<Men[j].x+30
if(Basket[i].master!=Men[j] && Basket[i].x < Men[j].x+30 && Basket[i].x > Men[j].x && Basket[i].y>Men[j].y && Basket[i].y<Men[j].y+85){
Basket[i].living = false;
Men[j].hurt();
}
}
}
for(var i=0;i<Basket.length;i++){
Basket[i].x += Basket[i].sx * lerp / 10;
Basket[i].y += Basket[i].sy * lerp / 10;
Basket[i].style.left = Basket[i].x;
Basket[i].style.top = Basket[i].y;
if(Basket[i].x<-10 || Basket[i].x>w+10 || Basket[i].y<-10 || Basket[i].y>h+10 || Basket[i].living==false){
document.body.removeChild(Basket[i]);
delete Basket[i];
}
}
var temp = [];
for(var i=0;i<Basket.length;i++){
if(Basket[i]!==undefined){
temp.push(Basket[i]);
}
}
Basket = temp;
for(var j=0;j<Men.length;j++){
if(Men[j].HP <= 0){
document.body.removeChild(Men[j].shell);
delete Men[j];
if(Men.length<=10){
for(var i=0;i<Math.random()*2000+1;i++){
Men.push(new Man())}
}
//if(Math.random()*250>Men.length){
// Men.push(new Man());
//}
}
}
var temp = [];
for(var i=0;i<Men.length;i++){
if(Men[i]!==undefined){
temp.push(Men[i]);
}
}
Men = temp;
requestAnimationFrame(raf);
starttime = endtime;
sumMen.innerText = "人数："+ Men.length;
sumBasket.innerText = "子弹数：" + Basket.length;
}
init();
requestAnimationFrame(raf);
</script>
</html>
把上面那些图片下载下来保存成如上即可，图片并不重要，可以替换成自己的东西。最后加一张群殴效果图：
搞定。
标签：互殴,style,ball,javascript,random,基本要素,var,Math,man 来源： https://blog.csdn.net/sinolzeng/article/details/113788748